When a particle is subjected to higher drying rates,
the evaporation of moisture is rapid and promotes the formation of a
hard crust that does not allow particle shrinkage during spray drying.
However, if the inlet temperature is lower, the particle remains moist
for a longer period of time and shrinks, thus decreasing its size [39].
Tonon et al. [40] reported similar behaviors in spray-dried acai powders.
Obon et al. [41] obtained an average particle size of 10–12 mm for cactus
pear juice produced by spray drying, whereas Tonon et al. [40] reported
that the mean diameter of spray-dried acai powder varied between 13
and 21 mm.